Browsing by Author "Lamikiz-Mentxaka, Aitzol"
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Item CAPACITATION OF FLEXIBLES FIXTURES FOR ITS USE IN HIGH QUALITY MACHINING PROCESSES: AN APPLICATION CASE OF THE INDUSTRY 4.0. PARADIGM: Un caso de aplicación del paradigma Industria 4.0(2018-11) Rubio-Mateos, Antonio; Rivero-Rastrero, Asun; Del Sol-Illana, Irene; Ukar-Arrien, Eneko; Lamikiz-Mentxaka, Aitzol; FABRIC_INTEL; SGThe incipient implementation of the Industry 4.0 paradigm has led to an increase in the machines sensoring level, in the processes optimization and, thus, in the product manufacturing with a higher added value. In this article a new aspect is described where, through the machine monitoring, the utilization of innovative elements as fixture is enabled for high quality machining processes. These innovative elements are characterized by the great flexibility offered by them as holding component and by their low costs. However, these elements lack the enough geometrical accuracy for applications where a high shape and surface quality product are needed. First of all, in order to have a clear vision of the singularities of each fixture type present on the state of the art, a nomenclature and a classification has been proposed based on their geometry characteristics. Hence, based on this classification, an analysis of the different fixturing solutions provided by the market has been made, enhancing the advantages of this solution against the existing ones. With the aim of demonstrating its suitability for certain machining applications, the behavior of these sort of flexible materials has been characterized. Besides, the sensors implementation has been analyzed in order to capacitate this solution for processes where tough tolerances on parts are demanded. Therefore, this survey demonstrates that, through the massive information gathering, not only an optimization of the existing technologies is obtained, but it is possible to develop innovative solutions that provide improved capacities to the already existing ones in the Industry.Item OPTIMIZATION OF THE EFFICIENCY OF THE LASER METAL DEPOSITION PROCESS APPLIED TO HIGH HARDNESS COATINGS BY THE ANALYSIS OF DIFFERENT TYPES OF COAXIAL NOZZLES(2018-11) Ramiro-Castro, Pedro; Ortiz-Edesa, Mikel; Alberdi-Gurrutxaga, Amaia; Lamikiz-Mentxaka, Aitzol; FABRIC_INTELLaser Metal Deposition (LMD) or laser cladding is a technology capable of coating, repairing and manufacturing components by injecting molten metal powder on a substrate. Some of the advantages of this technology are: wide range of materials available in powder, reduced thermal distortion, coatings and repaired parts of high quality. However, the biggest advantage can be its relative ease of implementation in a multiprocess machine tool and subsequent automatization. The supply of hybrid machines in the world market that implements the LMD process is increasing (IBARMIA, DMG MORI, MAZAK, OKUMA, etc...), making the production more flexible in a single machine and introducing this process in more applications and industrial sectors. However, hybridization also presents problems that are difficult to solve. Some of the most noteworthy are those associated with the use of powdered metallic material both from the point of view of the safety and hygiene of the operators and also of the waste management and integrity of the machine itself, being its most serious effects at lower efficiency of the process. In this article, the study of the efficiency of different LMD nozzles is addressed for the coating of a hardened steel using for it the hybrid multiprocess machine IBARMIA ZVH45 /1600 Add + process, with the aim of finding the most efficient and, therefore (the one that generates less waste) and which, in turn, offers good productivity.